The measurement of blood-plasma velocity distributions with spatial and temporal resolution in vivo is inevitable for the determination of shear stress distributions in complex geometries at unsteady flow conditions like in the beating heart. A nonintrusive, whole-field velocity measurement technique is required that is capable of measuring instantaneous flow fields at submillimeter scales in highly unsteady flows. Micro particle image velocimetry ðmPIVÞ meets these demands, but requires special consideration and methodologies in order to be utilized for in vivo studies in medical and biological research. We adapt mPIV to measure the blood-plasma velocity in the beating heart of a chicken embryo. In the current work, bio-inert, fluorescent liposomes with a nominal diameter of 400nm are added to the flow as a tracer. Because of their small dimension and neutral buoyancy the liposomes closely follow the movement of the blood-plasma and allow the determination of the velocity gradient close to the wall. The measurements quantitatively resolve the velocity distribution in the developing ventricle and atrium of the embryo at nine different stages within the cardiac cycle. Up to 400 velocity vectors per measurement give detailed insight into the fluid dynamics of the primitive beating heart. A rapid peristaltic contraction accelerates the flow to peak velocities of 26 mm/s, with the velocity distribution showing a distinct asymmetrical profile in the highly curved section of the outflow tract. In relation to earlier published gene-expression experiments, the results underline the significance of fluid forces for embryonic cardiogenesis. In general, the measurements demonstrate that mPIV has the potential to develop into a general tool for instationary flow conditions in complex flow geometries encountered in cardiovascular research.

研究发现暴露于绿色560nm和蓝色480nmLED灯下，可以促进肉鸡的生长。与绿色和蓝色LED灯相比，580 nm黄色LED灯对肉鸡生产具有相同的刺激效果，基于对人体无负面影响的优点，同时黄色LED较低的发光效率，所以探索冷白光LED和580nm黄光LED组合，研究了白色×黄色混合LED阵列对鸡的生长，脂肪沉积，骨骼发育和体温的影响，应用于中国肉鸡培育。

在马术表演中，红外热像仪常用于确定表演马匹是否受伤，并定位马匹 的受伤部位，但赫尔辛基大学兽医教学医院的一项研究表明，红外热像 仪同样也是发现宠物健康问题的实用工具。

红外热像仪不仅能记录红外图像，而且还能测量物体的表面温度。机载处理器通过图像增强和计算功能可测量物体表面的温度。这种在测量温度的同时又能生成物体图像的方法在兽医学领域具有十分广阔的新应用前景。

本研究应用了400-1000nm的高光谱相机，可采用杭州彩谱科技有限公司产品FS13进行相关研究。光谱范围在400-1000nm，波长分辨率优于2.5nm，可达1200个光谱通道。采集速度全谱段可达128FPS，波段选择后最高3300Hz（支持多区域波段选择）

氮含量及粗蛋白质的计算 方案摘要：本研究研究了霉脱素(AZOMITE) 对低蛋白日粮肉鸡生长性能、养分利用、血清生化指标及骨矿化的影响。